src/plugin_xmms/plugin.c

   1 /* libxmms-flac - XMMS FLAC input plugin
   2  * Copyright (C) 2000,2001,2002  Josh Coalson
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #include <pthread.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <glib.h>
  24
  25 #include <xmms/plugin.h>
  26 #include <xmms/util.h>
  27 #include <xmms/configfile.h>
  28 #include <xmms/titlestring.h>
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include <config.h>
  32 #endif
  33
  34 #ifdef HAVE_LANGINFO_CODESET
  35 #include <langinfo.h>
  36 #endif
  37
  38 #include "FLAC/all.h"
  39 #include "plugin_common/all.h"
  40 #include "share/grabbag.h"
  41 #include "configure.h"
  42 #include "wrap_id3.h"
  43 #include "charset.h"
  44
  45 #ifdef min
  46 #undef min
  47 #endif
  48 #define min(x,y) ((x)<(y)?(x):(y))
  49
  50 extern void FLAC_XMMS__file_info_box(char *filename);
  51
  52 typedef struct {
  53         FLAC__bool abort_flag;
  54         FLAC__bool is_playing;
  55         FLAC__bool eof;
  56         FLAC__bool play_thread_open; /* if true, is_playing must also be true */
  57         unsigned total_samples;
  58         unsigned bits_per_sample;
  59         unsigned channels;
  60         unsigned sample_rate;
  61         unsigned length_in_msec;
  62         gchar *title;
  63         AFormat sample_format;
  64         int seek_to_in_sec;
  65         FLAC__bool has_replaygain;
  66         double replay_scale;
  67         DitherContext dither_context;
  68 } file_info_struct;
  69
  70 static void FLAC_XMMS__init();
  71 static int  FLAC_XMMS__is_our_file(char *filename);
  72 static void FLAC_XMMS__play_file(char *filename);
  73 static void FLAC_XMMS__stop();
  74 static void FLAC_XMMS__pause(short p);
  75 static void FLAC_XMMS__seek(int time);
  76 static int  FLAC_XMMS__get_time();
  77 static void FLAC_XMMS__cleanup();
  78 static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length);
  79
  80 static void *play_loop_(void *arg);
  81 static FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder);
  82 static void safe_decoder_finish_(FLAC__FileDecoder *decoder);
  83 static void safe_decoder_delete_(FLAC__FileDecoder *decoder);
  84 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
  85 static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
  86 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
  87
  88 InputPlugin flac_ip =
  89 {
  90         NULL,
  91         NULL,
  92         "Reference FLAC Player v" VERSION,
  93         FLAC_XMMS__init,
  94         FLAC_XMMS__aboutbox,
  95         FLAC_XMMS__configure,
  96         FLAC_XMMS__is_our_file,
  97         NULL,
  98         FLAC_XMMS__play_file,
  99         FLAC_XMMS__stop,
 100         FLAC_XMMS__pause,
 101         FLAC_XMMS__seek,
 102         NULL,
 103         FLAC_XMMS__get_time,
 104         NULL,
 105         NULL,
 106         FLAC_XMMS__cleanup,
 107         NULL,
 108         NULL,
 109         NULL,
 110         NULL,
 111         FLAC_XMMS__get_song_info,
 112         FLAC_XMMS__file_info_box,
 113         NULL
 114 };
 115
 116 #define SAMPLES_PER_WRITE 512
 117 static FLAC__int32 reservoir_[FLAC__MAX_BLOCK_SIZE * 2/*for overflow*/ * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
 118 static FLAC__byte sample_buffer_[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8)]; /* (24/8) for max bytes per sample */
 119 static unsigned wide_samples_in_reservoir_ = 0;
 120
 121 static FLAC__FileDecoder *decoder_ = 0;
 122 static file_info_struct file_info_;
 123 static pthread_t decode_thread_;
 124 static FLAC__bool audio_error_ = false;
 125
 126 #define BITRATE_HIST_SEGMENT_MSEC 500
 127 /* 500ms * 50 = 25s should be enough */
 128 #define BITRATE_HIST_SIZE 50
 129 static unsigned bitrate_history_[BITRATE_HIST_SIZE];
 130
 131
 132 InputPlugin *get_iplugin_info()
 133 {
 134         flac_ip.description = g_strdup_printf("Reference FLAC Player v%s", FLAC__VERSION_STRING);
 135         return &flac_ip;
 136 }
 137
 138 void FLAC_XMMS__init()
 139 {
 140         ConfigFile *cfg;
 141
 142         flac_cfg.title.tag_override = FALSE;
 143         g_free(flac_cfg.title.tag_format);
 144         flac_cfg.title.convert_char_set = FALSE;
 145
 146         cfg = xmms_cfg_open_default_file();
 147
 148         /* title */
 149
 150         xmms_cfg_read_boolean(cfg, "flac", "title.tag_override", &flac_cfg.title.tag_override);
 151
 152         if(!xmms_cfg_read_string(cfg, "flac", "title.tag_format", &flac_cfg.title.tag_format))
 153                 flac_cfg.title.tag_format = g_strdup("%p - %t");
 154
 155         xmms_cfg_read_boolean(cfg, "flac", "title.convert_char_set", &flac_cfg.title.convert_char_set);
 156
 157         if(!xmms_cfg_read_string(cfg, "flac", "title.file_char_set", &flac_cfg.title.file_char_set))
 158                 flac_cfg.title.file_char_set = FLAC_plugin__charset_get_current();
 159
 160         if(!xmms_cfg_read_string(cfg, "flac", "title.user_char_set", &flac_cfg.title.user_char_set))
 161                 flac_cfg.title.user_char_set = FLAC_plugin__charset_get_current();
 162
 163         /* replaygain */
 164
 165         xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.enable", &flac_cfg.output.replaygain.enable);
 166
 167         xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.album_mode", &flac_cfg.output.replaygain.album_mode);
 168
 169         if(!xmms_cfg_read_int(cfg, "flac", "output.replaygain.preamp", &flac_cfg.output.replaygain.preamp))
 170                 flac_cfg.output.replaygain.preamp = 0;
 171
 172         xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.hard_limit", &flac_cfg.output.replaygain.hard_limit);
 173
 174         xmms_cfg_read_boolean(cfg, "flac", "output.resolution.normal.dither_24_to_16", &flac_cfg.output.resolution.normal.dither_24_to_16);
 175         xmms_cfg_read_boolean(cfg, "flac", "output.resolution.replaygain.dither", &flac_cfg.output.resolution.replaygain.dither);
 176
 177         if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.noise_shaping", &flac_cfg.output.resolution.replaygain.noise_shaping))
 178                 flac_cfg.output.resolution.replaygain.noise_shaping = 1;
 179
 180         if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.bps_out", &flac_cfg.output.resolution.replaygain.bps_out))
 181                 flac_cfg.output.resolution.replaygain.bps_out = 16;
 182
 183         decoder_ = FLAC__file_decoder_new();
 184 }
 185
 186 int FLAC_XMMS__is_our_file(char *filename)
 187 {
 188         char *ext;
 189
 190         ext = strrchr(filename, '.');
 191         if(ext)
 192                 if(!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla"))
 193                         return 1;
 194         return 0;
 195 }
 196
 197 void FLAC_XMMS__play_file(char *filename)
 198 {
 199         FILE *f;
 200
 201         wide_samples_in_reservoir_ = 0;
 202         audio_error_ = false;
 203         file_info_.abort_flag = false;
 204         file_info_.is_playing = false;
 205         file_info_.eof = false;
 206         file_info_.play_thread_open = false;
 207         file_info_.has_replaygain = false;
 208
 209         if(0 == (f = fopen(filename, "r")))
 210                 return;
 211         fclose(f);
 212
 213         if(decoder_ == 0)
 214                 return;
 215
 216         if(!safe_decoder_init_(filename, decoder_))
 217                 return;
 218
 219         if(file_info_.has_replaygain && flac_cfg.output.replaygain.enable && flac_cfg.output.resolution.replaygain.dither)
 220                 FLAC__plugin_common__init_dither_context(&file_info_.dither_context, file_info_.bits_per_sample, flac_cfg.output.resolution.replaygain.noise_shaping);
 221
 222         file_info_.is_playing = true;
 223
 224         if(flac_ip.output->open_audio(file_info_.sample_format, file_info_.sample_rate, file_info_.channels) == 0) {
 225                 audio_error_ = true;
 226                 safe_decoder_finish_(decoder_);
 227                 return;
 228         }
 229
 230         file_info_.title = flac_format_song_title(filename);
 231         flac_ip.set_info(file_info_.title, file_info_.length_in_msec, file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample, file_info_.sample_rate, file_info_.channels);
 232
 233         file_info_.seek_to_in_sec = -1;
 234         file_info_.play_thread_open = true;
 235         pthread_create(&decode_thread_, NULL, play_loop_, NULL);
 236 }
 237
 238 void FLAC_XMMS__stop()
 239 {
 240         if(file_info_.is_playing) {
 241                 file_info_.is_playing = false;
 242                 if(file_info_.play_thread_open) {
 243                         file_info_.play_thread_open = false;
 244                         pthread_join(decode_thread_, NULL);
 245                 }
 246                 flac_ip.output->close_audio();
 247                 safe_decoder_finish_(decoder_);
 248         }
 249 }
 250
 251 void FLAC_XMMS__pause(short p)
 252 {
 253         flac_ip.output->pause(p);
 254 }
 255
 256 void FLAC_XMMS__seek(int time)
 257 {
 258         file_info_.seek_to_in_sec = time;
 259         file_info_.eof = false;
 260
 261         while(file_info_.seek_to_in_sec != -1)
 262                 xmms_usleep(10000);
 263 }
 264
 265 int FLAC_XMMS__get_time()
 266 {
 267         if(audio_error_)
 268                 return -2;
 269         if(!file_info_.is_playing || (file_info_.eof && !flac_ip.output->buffer_playing()))
 270                 return -1;
 271         else
 272                 return flac_ip.output->output_time();
 273 }
 274
 275 void FLAC_XMMS__cleanup()
 276 {
 277         safe_decoder_delete_(decoder_);
 278         decoder_ = 0;
 279 }
 280
 281 void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
 282 {
 283         FLAC__StreamMetadata streaminfo;
 284
 285         if(0 == filename)
 286                 filename = "";
 287
 288         if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) {
 289                 /* @@@ how to report the error? */
 290                 if(title) {
 291                         static const char *errtitle = "Invalid FLAC File: ";
 292                         *title = g_malloc(strlen(errtitle) + 1 + strlen(filename) + 1 + 1);
 293                         sprintf(*title, "%s\"%s\"", errtitle, filename);
 294                 }
 295                 if(length_in_msec)
 296                         *length_in_msec = -1;
 297                 return;
 298         }
 299
 300         if(title) {
 301                 *title = flac_format_song_title(filename);
 302         }
 303         if(length_in_msec)
 304                 *length_in_msec = streaminfo.data.stream_info.total_samples * 10 / (streaminfo.data.stream_info.sample_rate / 100);
 305 }
 306
 307 /***********************************************************************
 308  * local routines
 309  **********************************************************************/
 310
 311 void *play_loop_(void *arg)
 312 {
 313         unsigned written_time_last = 0, bh_index_last_w = 0, bh_index_last_o = BITRATE_HIST_SIZE;
 314         FLAC__uint64 decode_position_last = 0;
 315
 316         (void)arg;
 317
 318         while(file_info_.is_playing) {
 319                 if(!file_info_.eof) {
 320                         while(wide_samples_in_reservoir_ < SAMPLES_PER_WRITE) {
 321                                 if(FLAC__file_decoder_get_state(decoder_) == FLAC__FILE_DECODER_END_OF_FILE) {
 322                                         file_info_.eof = true;
 323                                         break;
 324                                 }
 325                                 else if(!FLAC__file_decoder_process_single(decoder_)) {
 326                                         /*@@@ this should probably be a dialog */
 327                                         fprintf(stderr, "libxmms-flac: READ ERROR processing frame\n");
 328                                         file_info_.eof = true;
 329                                         break;
 330                                 }
 331                         }
 332                         if(wide_samples_in_reservoir_ > 0) {
 333                                 const unsigned channels = file_info_.channels;
 334                                 const unsigned bits_per_sample = file_info_.bits_per_sample;
 335                                 const unsigned n = min(wide_samples_in_reservoir_, SAMPLES_PER_WRITE);
 336                                 const unsigned delta = n * channels;
 337                                 int bytes;
 338                                 unsigned i, written_time, bh_index_w;
 339                                 FLAC__uint64 decode_position;
 340
 341                                 if(flac_cfg.output.replaygain.enable && file_info_.has_replaygain) {
 342                                         bytes = (int)FLAC__plugin_common__apply_gain(
 343                                                 sample_buffer_,
 344                                                 reservoir_,
 345                                                 n,
 346                                                 channels,
 347                                                 bits_per_sample,
 348                                                 flac_cfg.output.resolution.replaygain.bps_out,
 349                                                 file_info_.replay_scale,
 350                                                 flac_cfg.output.replaygain.hard_limit,
 351                                                 flac_cfg.output.resolution.replaygain.dither,
 352                                                 (NoiseShaping)flac_cfg.output.resolution.replaygain.noise_shaping,
 353                                                 &file_info_.dither_context
 354                                         );
 355                                 }
 356                                 else {
 357                                         bytes = (int)FLAC__plugin_common__pack_pcm_signed_little_endian(
 358                                                 sample_buffer_,
 359                                                 reservoir_,
 360                                                 n,
 361                                                 channels,
 362                                                 bits_per_sample,
 363                                                 flac_cfg.output.resolution.normal.dither_24_to_16?
 364                                                         min(bits_per_sample, 16) :
 365                                                         bits_per_sample
 366                                         );
 367                                 }
 368
 369                                 for(i = delta; i < wide_samples_in_reservoir_ * channels; i++)
 370                                         reservoir_[i-delta] = reservoir_[i];
 371                                 wide_samples_in_reservoir_ -= n;
 372
 373                                 flac_ip.add_vis_pcm(flac_ip.output->written_time(), file_info_.sample_format, channels, bytes, sample_buffer_);
 374                                 while(flac_ip.output->buffer_free() < (int)bytes && file_info_.is_playing && file_info_.seek_to_in_sec == -1)
 375                                         xmms_usleep(10000);
 376                                 if(file_info_.is_playing && file_info_.seek_to_in_sec == -1)
 377                                         flac_ip.output->write_audio(sample_buffer_, bytes);
 378
 379                                 /* compute current bitrate */
 380
 381                                 written_time = flac_ip.output->written_time();
 382                                 bh_index_w = written_time / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE ;
 383                                 if(bh_index_w != bh_index_last_w && wide_samples_in_reservoir_ < SAMPLES_PER_WRITE) {
 384                                         bh_index_last_w = bh_index_w;
 385                                         if(!FLAC__file_decoder_get_decode_position(decoder_, &decode_position))
 386                                                 decode_position = 0;
 387
 388                                         bitrate_history_[(bh_index_w + BITRATE_HIST_SIZE - 1) % BITRATE_HIST_SIZE] =
 389                                                 decode_position > decode_position_last && written_time > written_time_last ?
 390                                                         8000 * (decode_position - decode_position_last) / (written_time - written_time_last) :
 391                                                         file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample;
 392                                         decode_position_last = decode_position;
 393                                         written_time_last = written_time;
 394                                 }
 395                         }
 396                         else {
 397                                 file_info_.eof = true;
 398                                 xmms_usleep(10000);
 399                         }
 400                 }
 401                 else
 402                         xmms_usleep(10000);
 403                 if(file_info_.seek_to_in_sec != -1) {
 404                         const double distance = (double)file_info_.seek_to_in_sec * 1000.0 / (double)file_info_.length_in_msec;
 405                         unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
 406                         if(FLAC__file_decoder_seek_absolute(decoder_, (FLAC__uint64)target_sample)) {
 407                                 flac_ip.output->flush(file_info_.seek_to_in_sec * 1000);
 408                                 bh_index_last_w = bh_index_last_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
 409                                 file_info_.seek_to_in_sec = -1;
 410                                 file_info_.eof = false;
 411                                 wide_samples_in_reservoir_ = 0;
 412                         }
 413                 }
 414                 else {
 415                         /* display the right bitrate from history */
 416                         unsigned bh_index_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
 417                         if(bh_index_o != bh_index_last_o && bh_index_o != bh_index_last_w && bh_index_o != (bh_index_last_w + 1) % BITRATE_HIST_SIZE) {
 418                                 bh_index_last_o = bh_index_o;
 419                                 flac_ip.set_info(file_info_.title, file_info_.length_in_msec, bitrate_history_[bh_index_o], file_info_.sample_rate, file_info_.channels);
 420                         }
 421                 }
 422         }
 423
 424         safe_decoder_finish_(decoder_);
 425
 426         /* are these two calls necessary? */
 427         flac_ip.output->buffer_free();
 428         flac_ip.output->buffer_free();
 429
 430         g_free(file_info_.title);
 431
 432         pthread_exit(NULL);
 433         return 0; /* to silence the compiler warning about not returning a value */
 434 }
 435
 436 FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder)
 437 {
 438         if(decoder == 0)
 439                 return false;
 440
 441         safe_decoder_finish_(decoder);
 442
 443         FLAC__file_decoder_set_md5_checking(decoder, false);
 444         FLAC__file_decoder_set_filename(decoder, filename);
 445         FLAC__file_decoder_set_metadata_ignore_all(decoder);
 446         FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
 447         FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 448         FLAC__file_decoder_set_write_callback(decoder, write_callback_);
 449         FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
 450         FLAC__file_decoder_set_error_callback(decoder, error_callback_);
 451         FLAC__file_decoder_set_client_data(decoder, &file_info_);
 452         if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK)
 453                 return false;
 454
 455         if(!FLAC__file_decoder_process_until_end_of_metadata(decoder))
 456                 return false;
 457
 458         return true;
 459 }
 460
 461 void safe_decoder_finish_(FLAC__FileDecoder *decoder)
 462 {
 463         if(decoder && FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED)
 464                 FLAC__file_decoder_finish(decoder);
 465 }
 466
 467 void safe_decoder_delete_(FLAC__FileDecoder *decoder)
 468 {
 469         if(decoder) {
 470                 safe_decoder_finish_(decoder);
 471                 FLAC__file_decoder_delete(decoder);
 472         }
 473 }
 474
 475 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 476 {
 477         file_info_struct *file_info = (file_info_struct *)client_data;
 478         const unsigned channels = file_info->channels, wide_samples = frame->header.blocksize;
 479         unsigned wide_sample, offset_sample, channel;
 480
 481         (void)decoder;
 482
 483         if(file_info->abort_flag)
 484                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 485
 486         for(offset_sample = wide_samples_in_reservoir_ * channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 487                 for(channel = 0; channel < channels; channel++, offset_sample++)
 488                         reservoir_[offset_sample] = buffer[channel][wide_sample];
 489
 490         wide_samples_in_reservoir_ += wide_samples;
 491
 492         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
 493 }
 494
 495 void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
 496 {
 497         file_info_struct *file_info = (file_info_struct *)client_data;
 498         (void)decoder;
 499         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
 500                 FLAC__ASSERT(metadata->data.stream_info.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
 501                 file_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xffffffff);
 502                 file_info->bits_per_sample = metadata->data.stream_info.bits_per_sample;
 503                 file_info->channels = metadata->data.stream_info.channels;
 504                 file_info->sample_rate = metadata->data.stream_info.sample_rate;
 505
 506 #ifdef FLAC__DO_DITHER
 507                 if(file_info->bits_per_sample == 8) {
 508                         file_info->sample_format = FMT_S8;
 509                 }
 510                 else if(file_info->bits_per_sample == 16 || file_info->bits_per_sample == 24) {
 511                         file_info->sample_format = FMT_S16_LE;
 512                 }
 513                 else {
 514                         /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16/24-bit samples\n", "ERROR: plugin can only handle 8/16/24-bit samples", 0); */
 515                         file_info->abort_flag = true;
 516                         return;
 517                 }
 518 #else
 519                 if(file_info->bits_per_sample == 8) {
 520                         file_info->sample_format = FMT_S8;
 521                 }
 522                 else if(file_info->bits_per_sample == 16) {
 523                         file_info->sample_format = FMT_S16_LE;
 524                 }
 525                 else {
 526                         /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */
 527                         file_info->abort_flag = true;
 528                         return;
 529                 }
 530 #endif
 531                 file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
 532         }
 533         else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
 534                 double gain, peak;
 535                 if(grabbag__replaygain_load_from_vorbiscomment(metadata, flac_cfg.output.replaygain.album_mode, &gain, &peak)) {
 536                         file_info_.has_replaygain = true;
 537                         file_info_.replay_scale = grabbag__replaygain_compute_scale_factor(peak, gain, (double)flac_cfg.output.replaygain.preamp, /*prevent_clipping=*/!flac_cfg.output.replaygain.hard_limit);
 538                 }
 539         }
 540 }
 541
 542 void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 543 {
 544         file_info_struct *file_info = (file_info_struct *)client_data;
 545         (void)decoder;
 546         if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
 547                 file_info->abort_flag = true;
 548 }